/**
 * @param {string} path
 * @returns {Boolean}
 */
export function isExternal(path) {
  return /^(https?:|mailto:|tel:)/.test(path);
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUsername(str) {
  const valid_map = ["admin", "editor"];
  return valid_map.indexOf(str.trim()) >= 0;
}

/**
 * @param {string} url
 * @returns {Boolean}
 */
export function validURL(url) {
  const reg =
    /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/;
  return reg.test(url);
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validLowerCase(str) {
  const reg = /^[a-z]+$/;
  return reg.test(str);
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUpperCase(str) {
  const reg = /^[A-Z]+$/;
  return reg.test(str);
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validAlphabets(str) {
  const reg = /^[A-Za-z]+$/;
  return reg.test(str);
}

/**
 * @param {string} email
 * @returns {Boolean}
 */
export function validEmail(email) {
  const reg =
    /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  return reg.test(email);
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function isString(str) {
  return typeof str === "string" || str instanceof String;
}

/**
 * @param {Array} arg
 * @returns {Boolean}
 */
export function isArray(arg) {
  if (typeof Array.isArray === "undefined") {
    return Object.prototype.toString.call(arg) === "[object Array]";
  }
  return Array.isArray(arg);
}

/**
 * 校验只允许输入数字
 * @param {*} number 
 */
export function isNumber(number) {
  let value = 0;
  let cleanedValue = number.replace(/[^\d.]/g, ""); //移除非数字和小数点
  cleanedValue = cleanedValue.replace(/^0\d+/g, ""); //当输入第二个00的时候直接清空输入框
  if (/\.\d+\./.test(cleanedValue)) {
    //当输入多个小数点匹配其数字和小数点组合
    cleanedValue = cleanedValue.replace(/\.\d+\./g, "."); // 移除中间的数字和小数点组合
  }
  let parts = cleanedValue.split("."); //分割小数点
  if (parts.length === 2) {
    value = `${parts[0].replace(/^0+(\d)/, "$1")}.${parts[1].slice(0, 2)}`;
  } else {
    const firstDigit = cleanedValue.match(/\d/);

    if (firstDigit && firstDigit[0] !== "0") {
      value = cleanedValue.endsWith(".") ? cleanedValue : cleanedValue;
    } else {
      value = firstDigit
        ? cleanedValue.replace(/^0+(\d)/, "$1")
        : cleanedValue.slice(1);
    }
  }
  return value;
}
